A battery device includes a main body and a rear cover removably connected to the main body. The main body has a first battery receiving compartment. The rear cover has a second battery receiving compartment. The first battery receiving compartment is configured to receive at least two batteries while the second battery receiving compartment is configured to receive at least one battery.

For the battery device, since the back cover is provided with the second battery receiving compartment cooperating with the first battery receiving compartment in the body, the apparatus applying the battery device has at least two supportable power levels. In this way, the battery device can be switched between a low power and a high power, eliminating the need of another battery device.

A bicycle component is provided with a base including a recess, a cover, a protected member that is at least partially arranged in the recess, and an engagement portion. The cover is configured to close the recess. The protected member is at least partially arranged in the recess. The engagement portion is configured separately from the cover and the protected member. The engagement portion is arranged in the recess and engages the cover that covers the recess.

A battery for a vehicle having a fixed battery pack and a replaceable battery pack. The replaceable battery pack has electronic or mechanical locks to semi-temporarily hold the replaceable battery pack in place. The fixed battery pack is held in place via permanent or semi-permanent fasteners such as bolts. A battery controller controls the replaceable battery pack to power motors of the vehicle before controlling the fixed battery pack to power motors of the vehicle.

The present invention discloses an arc-shaped battery box structure for light-fixture, comprising an arc-shaped box body provided with a battery compartment and a battery cover covering the battery compartment in a matching and sealing manner, wherein, the battery cover and the battery compartment are in the shape of an elongated arc and matched with each other; an end portion of the battery cover is inclined and bent towards the battery compartment, or an open end portion of the battery compartment is inclined and bent towards the battery cover, or the end portion of the battery cover and the open end portion of the battery compartment are inclined and bent towards each other; and the battery cover and the battery compartment are quickly interlocked at an arc-shaped side wall.

A method for housing a battery used on a light-weight, motor powered watercraft includes the step of: providing a battery case having: a pod sized to house a marine battery, the pod having a cavity for the marine battery and an open top; a lid for at least water-resistant closure of the open top of the pod, the lid having a cavity and an open bottom, the lid is releasably attachable to the pod; and a floor releasably attached to the lid adjacent the open bottom, the floor adapted to hold controls for the light-weight, motor powered watercraft.

A system and method for monitoring the health of smart battery packs in an electric vehicle and determining when one or more of the smart battery packs needs to be replaced. In addition, the system and method locate optimal smart battery packs to exchange with the one or more battery packs that need to be replaced.

In some examples, an electronic device includes an electronic component, a battery pack that is dockable to the electronic component, and a lock to lock a docked battery pack to the electronic device. In some examples, the lock is to move to a locked state in which the docked battery pack is to be locked to the electronic device and electrically coupled to the electronic component to power the electronic component using the docked battery pack and the lock is to move to an unlocked state in which the docked battery pack is to be unlocked from the electronic device and electrically isolated from the electronic component.

Disclosed is a battery pack which has a simple structure, small volume and weight, and efficient cooling performance. The battery pack includes a module assembly including a plurality of secondary batteries, and a plurality of cartridges configured to be stacked with each other and surround an outer circumference of the secondary batteries at an outer side, the plurality of cartridges being at least partially made of thermally-conductive material; and a pack case having an empty space therein to accommodate the module assembly and at least partially made of thermally-conductive material to discharge heat of the module assembly.

A battery pack includes multiple sub-modules each of which includes multiple battery cells electrically connected to each other, and an exhaust duct that is provided between and integrated with at least the two battery modules facing each other. The exhaust duct includes therein an exhaust passage that communicates with an outer surface of a safety valve provided in each battery cell in each of the facing battery modules.

An under body may include a side sill inside front panel bent similar to the side sill inside panel to connect a front end portion of the side sill inside panel with a dash panel to be bonded to each other; a front side member connecting member connected with a bottom surface of the dash panel and a rear end portion of a front side member while being bonded to an inside surface of the side sill inside front panel; a side sill inside rear panel configured to connect a rear end portion of the side sill inside panel with a rear side member to be bonded to each other; and a rear side member connecting member configured to connect a bottom end portion of the side sill inside rear panel with a front inside surface of a rear side member to be bonded to each other.